const lines = require("fs").readFileSync("/dev/stdin", "utf8").toString().trim().split('\n');

const t = +lines[0];
for (let i = 1; i <= t; i++) {
  const n = +lines[i];
  const total = n * (n + 1) / 2;
  if (total % 2 === 1) {
    console.log(-1);
  } else {
    const result = [];
    for (let i = 0; i < n; i++) {
      result[i] = 0;
    }
    let sum = total / 2;
    for (let i = n; i >= 1, sum > 0; i--) {
      if (sum >= i) {
        sum -= i;
        result[i - 1] = 1;
      }
    }
    console.log(result.join(''));
  }
}